Arsene Wenger felt Arsenal could have played all night and not have scored against Southampton on Wednesday night.
The Gunners were beaten 2-0 by the Saints in the quarter-final of the EFL Cup at the Emirates Stadium on what was an extremely disappointing night for the North London club.
"It was one of those nights where it looked like we can play for two hours and not score a goal," Wenger said.
"We didn't have enough urgency in the first half.
"We were weak in some departments and we paid for that.
"I have no regrets over selection, I regret we lost the game."